2.09 Tuning Tests by Motor City Tunes and the community
- Thread starter Motor City Hami
- 68 comments
- 8,226 views
- 1,348
- ugabugaz
I've begun collecting data on Route X with a M3 Coupe '07 on SS tires. I think I'll be done by tonight. Getting quite interesting data so far -Stock suspension is fastest at the moment. Full Suspension seems to be getting there as I increase Ride Height.
Edit: Decided to switch to R3 because SS results were just too inconsistent.
Edit: Decided to switch to R3 because SS results were just too inconsistent.
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- 1,348
- ugabugaz
It's going to tell me things other than how a car handles. Meaning how a car accelerates with different Ride Heights and how fast it can go top end wise. You can then use this data in a tune. As I said in my previous post, I'll test cornering speed on Top Gear.
Edit: Finished testing Positive Ride Heights
RACING SOFT TIRES - Same results after 3 Runs per RH
Stock = Stock Suspension
Full Stock = Buying Fully Cust. Suspension
Full Minimal = Removing all Toe and Camber from Suspension (Only rear toe in M3's case)
Last test = Full Stock at +40/+40
Result: Max at both ends = Fastest everything included here
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- 28,470
- Windsor, Ontario, Canada
- Johnnypenso
It's going to tell me things other than how a car handles. Meaning how a car accelerates with different Ride Heights and how fast it can go top end wise. You can then use this data in a tune. As I said in my previous post, I'll test cornering speed on Top Gear.
Edit: Finished testing Positive Ride Heights
RACING SOFT TIRES - Same results after 3 Runs per RH
Stock = Stock Suspension
Full Stock = Buying Fully Cust. Suspension
Full Minimal = Removing all Toe and Camber from Suspension (Only rear toe in M3's case)
Last test = Full Stock at +40/+40
Result: Max at both ends = Fastest everything included here
Well done but I'm not sure how this would help in tuning a car for circuit racing, maybe I'm missing something.
In the standing mile run for example you have gaps of roughly .010 at most. .010 at 250 km/h translates into roughly 60-70 cm? Perhaps 2 metres in a full lap? I would think the effect of ride height in cornering would far and away be more significant in anything but drag racing no?
- 1,348
- ugabugaz
Well done but I'm not sure how this would help in tuning a car for circuit racing, maybe I'm missing something.
This is mainly for information. I was curious so I decided to share my findings with more than just myself. As I said, I'll also do some cornering tests later on.
- 10,456
- United States
- WrecklessAbandon
You should test the top speeds ugabugaz, so we can discern if it's actually a "speed" increase, or just grip, and subsequent momentum, from said grip.
It's no surprise for me to see high ride height do awesome off the line, because it does, some cases a lot. Never tested top speed though.
It's no surprise for me to see high ride height do awesome off the line, because it does, some cases a lot. Never tested top speed though.
- 1,348
- ugabugaz
I did test it, though it seems the transmission wasn't fully optimized. I basically got the same exact speed from like 4 different RH's. Once I find a good transmission value that maxes out well, I'll post some Top Speed results as well. But for now, like no difference whatsoever. Much different from 2.08 and below where Max/Min gave the best Top Speed by far.
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nomis3613
Premium
- 831
It's interesting that front ride height has less acceleration benefit than rear these days, IIRC front and rear had the same effect (eg +20/+40 gave the same time as +40/+20) when I tested it a while back. I'm looking forward to your top speed results.
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The results so far for ride height vs handling are indeed baffling. I reckon its worth keeping a close eye on tyre temps while cornering, for example in case increasing height adds grip up to a point but then beyond this it overloads the outside tyre. Other left-field ideas are:
- the effect is different high speed vs low speed (as mentioned by Adrenaline)
- it depends on weight distribution
- it depends on camber
- sports and racing tyres work differently
- PD are on drugs again...
One thing to watch out for is when turn-in >> mid-corner front grip. In this scenario, settings which further improve turn-in can feel like they actually add understeer (due to the extra turn-in causing the front end to be even more overloaded mid-corner, therefore it needs to understeer to recover).
Thanks everyone for sharing your results.
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